Garrattfan's Modelrailroading Pages
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SAR GMA/M (rebuild)
Further disassembly and cleaning
The project rested for a while. Other work was being done on my BR 52. Progress was slow anyway as time to dedicate to the hobby was thin on the ground. In March 2024 I received the intended gearboxes and motors for the GMAM and before trial fitting them, I grabbed the opportunity to do some further cleaning and disassembly. | |
The challenge: disassemble this lot without breaking anything. The jar on the left contains acetone, which dissolves cyanoacrylate glue.
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Disassembly of the frames of the front unit |
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In the trial I already disassembled the superstructure of the front unit. Now the chassis had to come apart. The front unit after disassembly and initial cleaning. |
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Again the black paint stuck stubbornly stuck to the metal. As concluded in the preceding disassembly trial I will use paint stripper instead of mechanical ways of removing the residues. | |
A thick coat of stripper was applied to the motion bracket | |
Before long the paint started to crinkle | |
And after ten minutes I could simply brush it off | |
The remainder in the etched lettering was picked out with a tooth pick and the part was cleaned with vinegar and rinsed with clean water. As good as new. |
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Rear unit |
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I could easily disassemble the front units frames by first soaking them in acetone. With the rear unit that proved to be more of a challenge because the very valuable Portescap motor and gearbox were solidly stuck in the frames and consequently I could not simply dunk the unit in acetone. I diligently took the frames apart, carefully wiggling glued joints until they gave way. This was especially tricky when removing the motion rods. After removing the wheels and the axles I got to the bare frame. I could now loosen the frame spacers and pry a knife blade between the frame plates and the gearbox sides, which broke the superglue, and I could lift the motor and gearbox out.
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This beauty performed wonderfully after a bit of cleaning and oiling. I intend to reuse it for the build of my NS 6300. |
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All parts laid out in a orderly fashion, now I still remember how they came apart. This photo will help me during the rebuild. |
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Boiler cradle |
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Straight out of the box. |
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After some hours in acetone. |
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And after some prying. Note that again the black paint resisted the acetone. I don't know what this stuff is, but it is very stubborn. |
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All parts. |
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After a round of paint stripper |
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